Sold for $9,200. Combination knife-gun devices have been popular for hundreds of years, spurred initially by the single-shot nature of early firearms. The designs evolved to incorporate revolver cylinders when the revolver was invented, and remain interesting to people even to the present day. Global Research And Development (GRAD) of Las Vegas manufactured the CM-1 combination knife and revolver in the 1990s. Where most such weapons are not disguised, the CM-1 design hid the revolver and barrel mechanism
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